Triterpenoids of Isertia hypoleuca leaves

Dammarane triterpenes from the resins of <i>Commiphora confusa</i>

“…Extraction of the resin of C. confusa with EtOAc yielded copious amounts (60%) of a yellowish oil which after column chromatography furnished four compounds with R f values of 0.14, 0.19, 0.28 and 0.36 (n-hexane/EtOAc, 9:1). a-Amyrin (R f 0.19) was readily identified by comparison of its data with previous reports [4,5]. EIMS of compound 1 (R f 0.14) revealed a molecular ion peak at m/z 444 with fragments resulting from loss of one and two molecules of water, respectively (m/z 426 and 408) indicating two hydroxyl groups.…”

Phytochemical Characterizations of Maranthes polyandra (Benth.) Prance

“…A group of typical signals consisting of an olefinic proton at δ H 5.18 (dd, J = 5.0, 2.5 Hz), two olefinic carbons at δ C 124.5, and 139.0, and a carbonyl signal at δ C 216.7, were suggestive of a urs-12-en-3-one skeleton. All NMR data showed great similarity with α-amyrone except an extra oxymethine signal at δ H 4.49 (br s) that is correlated with δ C 69.3 in HSQC [19,20]. The presence of a hydroxyl was confirmed at C-6 through COSY correlations between H-5 (δ H 1.22), H-7a (δ H 1.81, dd, 14.8, 3.8), H-7b (δ H 1.55, overlapped), and δ H 4.49, along with HMBC correlations between H-5 (δ H 1.22), H-7a (δ H 1.81), H-7b (δ H 1.55), and δ C 69.3.…”